Showing 2018 · astro-ph.GAShow all

82 papers · 2 filters

astro-ph.GA2018★ 38 cited

SOFIA Far Infrared Imaging Polarimetry of M82 and NGC 253: Exploring the Super-Galactic Wind

Terry Jay Jones, C. Darren Dowell, Enrique Lopez Rodriguez +22

We present Far-Infrared polarimetry observations of M82 at 53 and and NGC 253 at , which were taken with HAWC+ in polarimetry mode on the Stratospheric Ob…

astro-ph.GA2018★ 29 cited

Thermal balance and comparison of gas and dust properties of dense clumps in the Hi-GAL survey

Manuel Merello, Sergio Molinari, Kazi L. J. Rygl +7

We present a comparative study of physical properties derived from gas and dust emission in a sample of 1068 dense Galactic clumps. The sources are selected from the crossmatch of…

astro-ph.GA2018★ 27 cited

An Ammonia Spectral Map of the L1495-B218 Filaments in the Taurus Molecular Cloud: II CCS & HCN Chemistry and Three Modes of Star Formation in the Filaments

Young Min Seo, Liton Majumdar, Paul F. Goldsmith +22

We present deep CCS and HCN observations of the L1495-B218 filaments in the Taurus molecular cloud obtained using the K-band focal plane array on the 100m Green Bank Telescope.…

astro-ph.GA2018★ 29 cited

Methyl cyanide (CH3CN) and propyne (CH3CCH) in the low mass protostar IRAS 16293-2422

Ines Andron, Pierre Gratier, Liton Majumdar +4

Methyl cyanide (CH3CN) and propyne (CH3CCH) are two molecules commonly used as gas thermometers for interstellar gas. They are detected in several astrophysical environments and in…

astro-ph.GA2018★ 41 cited

Conditional Quenching: A detailed look at the SFR-Density Relation at z ~ 0.9 from ORELSE

Adam R. Tomczak, Brian C. Lemaux, Lori M. Lubin +10

We present a study of the star-formation rate (SFR)-density relation at z ~ 0.9 using data drawn from the Observations of Redshift Evolution in Large Scale Environments (ORELSE) su…

astro-ph.GA2018★ 86 cited

Chandra centres for COSMOS X-ray galaxy groups: Differences in stellar properties between central dominant and offset brightest group galaxies

Ghassem Gozaliasl, Alexis Finoguenov, Masayuki Tanaka +24

We present the results of a search for galaxy clusters and groups in the square degree of the COSMOS field using all available X-ray observations from the XMM-Newton and Ch…

astro-ph.GA2018★ 14 cited

The Massive and Distant Clusters of WISE Survey V: Extended Radio Sources in Massive Galaxy Clusters at z~1

Emily Moravec, Anthony H. Gonzalez, Daniel Stern +9

We present the results from a pilot study with the Karl G. Jansky Very Large Array (JVLA) to determine the radio morphologies of extended radio sources and the properties of their…

astro-ph.GA2018★ 147 cited

The Next Generation Virgo Cluster Survey. XXIII. Fundamentals of nuclear star clusters over seven decades in galaxy mass

R. Sánchez-Janssen, P. Côté, L. Ferrarese +25

Using deep, high resolution optical imaging from the Next Generation Virgo Cluster Survey we study the properties of nuclear star clusters (NSCs) in a sample of nearly 400 quiescen…

astro-ph.GA2018★ 161 cited

The NANOGrav 11-Year Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

K. Aggarwal, Z. Arzoumanian, P. T. Baker +60

Observations indicate that nearly all galaxies contain supermassive black holes (SMBHs) at their centers. When galaxies merge, their component black holes form SMBH binaries (SMBHB…

astro-ph.GA2018★ 63 cited

JCMT BISTRO survey: Magnetic Fields within the Hub-Filament Structure in IC 5146

Jia-Wei Wang, Shih-Ping Lai, Chakali Eswaraiah +130

We present the 850 m polarization observations toward the IC5146 filamentary cloud taken using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polar…

astro-ph.GA2018★ 65 cited

Persistence of the Color-Density Relation and Efficient Environmental Quenching to

Brian C. Lemaux, Adam R. Tomczak, Lori M. Lubin +10

Using ~5000 spectroscopically-confirmed galaxies drawn from the Observations of Redshift Evolution in Large Scale Environments (ORELSE) survey we investigate the relationship betwe…

astro-ph.GA2018★ 59 cited

Chemical Abundance Analysis of Tucana III, the Second -process Enhanced Ultra-Faint Dwarf Galaxy

J. L. Marshall, T. Hansen, J. D. Simon +56

We present a chemical abundance analysis of four additional confirmed member stars of Tucana III, a Milky Way satellite galaxy candidate in the process of being tidally disrupted a…

astro-ph.GA2018★ 28 cited

Feedback in W49A diagnosed with radio recombination lines and models

M. R. Rugel, D. Rahner, H. Beuther +20

We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (T…

astro-ph.GA2018★ 19 cited

Candidate Massive Galaxies at in the Dark Energy Survey

Pierandrea Guarnieri, Claudia Maraston, Daniel Thomas +52

Using stellar population models, we predicted that the Dark Energy Survey (DES) - due to its special combination of area (5000 deg. sq.) and depth () - would be in the po…

astro-ph.GA2018★ 22 cited

Identifying Young Stellar Objects in the Outer Galaxy: l = 224 deg Region in Canis Major

Marta Sewiło, Barbara A. Whitney, Bosco H. K. Yung +14

We study a very young star-forming region in the outer Galaxy that is the most concentrated source of outflows in the Spitzer Space Telescope GLIMPSE360 survey. This region, dubbed…

astro-ph.GA2018★ 23 cited

A SOFIA Survey of [CII] in the galaxy M51 I. [CII] as a tracer of Star Formation

Jorge L. Pineda, Christian Fischer, Maria Kapala +12

We present a [CII] 158um map of the entire M51 (including M51b) grand--design spiral galaxy observed with the FIFI-LS instrument on SOFIA. We compare the [CII] emission with the to…

astro-ph.GA2018★ 1 cited

Science with an ngVLA: The Sunyaev-Zeldovich Effect from Quasar and Starburst Winds

Mark Lacy, Suchetana Chatterjee, Avinanda Chakraborty +6

The Sunyaev-Zeldovich Effect (SZE) can be used to detect the hot bubbles in the intergalactic medium blown by energetic winds from AGN and starbursts. By directly constraining the…

astro-ph.GA2018★ 10 cited

The Environments of Luminous Radio - WISE Selected Infrared Galaxies

J. I. Penney, A. W. Blain, D. Wylezalek +17

We have observed the environments of a population of 33 heavily dust obscured, ultra-luminous, high-redshift galaxies, selected using WISE and NVSS at 1.3 with the Infra-Red Ar…

astro-ph.GA2018★ 67 cited

The Multiple Merger Assembly of a Hyper-luminous Obscured Quasar at redshift 4.6

T. Diaz-Santos, R. J. Assef, A. W. Blain +10

Galaxy mergers and gas accretion from the cosmic web drove the growth of galaxies and their central black holes at early epochs. We report spectroscopic imaging of a multiple merge…

astro-ph.GA2018★ 20 cited

NuSTAR and Keck Observations of Heavily Obscured Quasars Selected by WISE

Wei Yan, Ryan C. Hickox, Kevin N. Hainline +15

A primary aim of the Nuclear Spectroscopic Telescope Array (NuSTAR) mission is to find and characterize heavily obscured Active Galactic Nuclei (AGNs). Based on mid-infrared photom…

astro-ph.GA2018★ 33 cited

The Massive and Distant Clusters of WISE Survey IV: The Distribution of Active Galactic Nuclei in Galaxy Clusters at

Wenli Mo, Anthony Gonzalez, Daniel Stern +6

We present an analysis of the radial distribution of Active Galactic Nuclei (AGN) in galaxy clusters from the Massive and Distant Clusters of {\it WISE} Survey (MaDCoWS). Ma…

astro-ph.GA2018★ 27 cited

Direct Detection of Quasar Feedback Via the Sunyaev-Zeldovich Effect

Mark Lacy, Brian Mason, Craig Sarazin +6

The nature and energetics of feedback from thermal winds in quasars can be constrained via observations of the Sunyaev-Zeldovich Effect (SZE) induced by the bubble of thermal plasm…

astro-ph.GA2018★ 105 cited

Finding high-redshift strong lenses in DES using convolutional neural networks

C. Jacobs, T. Collett, K. Glazebrook +63

We search Dark Energy Survey (DES) Year 3 imaging data for galaxy-galaxy strong gravitational lenses using convolutional neural networks. We generate 250,000 simulated lenses at re…

astro-ph.GA2018★ 64 cited

Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard Star Fields

Zhefu Yu, Paul Martini, T. M. Davis +72

Measurements of the physical properties of accretion disks in active galactic nuclei are important for better understanding the growth and evolution of supermassive black holes. We…